Visual Processing in Texture Segregation
Abstract
Beck (1988) reported that the outputs of 2 D Gabor filters can account for much of the segregation of a periodic visual display (tripartite pattern) into regions. We have conducted a series of experiments showing that grouping processes, as well as the outputs of spatial-frequency/orientation channels, yield automatic spontaneous segregation. In our tripartite patterns, the arrangement of local properties is different in different regions so that if the display is suitably filtered by convolving the appropriate property at each point, or by performing some equivalent filtering process in the Fourier domain, the regions in the filtered display differ in different regions. We have shown that this type of computation is not able to account for the spontaneous segregation of a line in a display of disconnected shapes. A striking finding reported by Beck (1988) was that squares differing by a large lightness difference sometimes failed to give region segregation in a tripartite pattern while the same pattern of squares differing by a smaller lightness differences yielded strong region segregation. (kr)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 29, 1989
- Accession Number
- ADA216539
Entities
People
- Jacob Beck
Organizations
- University of Oregon